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The small-sized radios Svirel-2, Svirel-402 and Svirel RP-402-1 have been produced by Orsha factory Red October since 1983, 1989 and 1991.
Receivers `` Pipe-2 '' (402) are designed to receive radio stations in the range of LW and CB on an internal magnetic antenna.
The power of any receiver is carried out from three elements of type 316. The duration of operation of any of the receivers, when powered by elements of type 316, is 40 ... 45 hours, at an average volume.
The radio pipe `` Pipe-2 '' became a further modernization of the serial single-band receiver `` Pipe '', produced since 1981.
The `` Pipe-402 '' receiver replaced the `` Pipe-2 '', and the receiver `` Pipe-RP-402 '' manufactured since 1986 is the same P-pipe-402 radio receiver, but with the RP prefix according to the new GOST
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The receiver `` Flute RP-402-1 '' is an upgrade of previous models.
Ranges: LW - 148.0 ... 285.0 kHz, CB - 525.0 ... 1607.0 kHz.
Sensitivity in the range of LW - 2.5 mV / m, CB - 1.5 mV / m.
Selectivity 20 dB.
The maximum output power is 100 mW.
The frequency range for sound pressure is 450 ... 3150 Hz.
Radio receivers were also produced for export.